<template>
  <div>
    <el-card class="box-card">
      <div slot="header" class="clearfix">
        <span>文章列表</span>
      </div>
      <!-- 搜索区域 -->
      <div class="search-box">
        <el-form :inline="true" :model="q" ref="searchRef">
          <el-form-item label="文章分类">
            <el-select v-model="q.cate_id" placeholder="请选择分类" size="small">
              <el-option :label='item.cate_name' :value="item.id" v-for="item in cateList" :key="item.id"></el-option>
            </el-select>
          </el-form-item>

          <el-form-item label="发布状态" style="margin-left: 15px;">
            <el-select v-model="q.state" placeholder="请选择状态" size="small">
              <el-option label="已发布" value="已发布"></el-option>
              <el-option label="草稿" value="草稿"></el-option>
            </el-select>
          </el-form-item>

          <el-form-item>
            <el-button type="primary" size="small" @click="search">筛选</el-button>
            <el-button type="info" size="small" @click="reset()">重置</el-button>
          </el-form-item>
        </el-form>
        <!-- 发表文章的按钮 -->
        <el-button type="primary" size="small" class="btn-pub" @click="pubDialogVisible=true">发表文章</el-button>
      </div>

      <!-- 文章表格区域 -->
<el-table :data="artList"  border stripe>
   <el-table-column label="文章标题" >
     <template v-slot="{row}">
       <el-link type="primary" @click="getArtDetail(row.id)">{{row.title}}</el-link>
     </template>
   </el-table-column>

   <el-table-column label="分类" prop="cate_name"></el-table-column>
   <el-table-column label="发表时间">
      <template v-slot="{row}">
            {{row.pub_date | dateFormat}}
      </template>
   </el-table-column>
   <el-table-column label="状态" prop="state"></el-table-column>
   <el-table-column label="操作">
     <template v-slot="{row}">
        <el-button type="danger" size="mini" @click="delArticle(row.id)">删除</el-button>
     </template>
   </el-table-column>
</el-table>

      <!-- 分页区域 -->
      <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="q.pagenum"
          :page-sizes="[2, 3, 5, 10]"
          :page-size="q.pagesize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total">
       </el-pagination>
  </el-card>

 <el-dialog
      title="发表文章"
      :visible.sync="pubDialogVisible"
      fullscreen
      :before-close="handleBeforeClose"
      @close="handleClose"
      >

  <el-form :model="pubForm" :rules="pubRules" ref="pubRef" label-width="100px">
         <el-form-item label="文章标题" prop="title">
           <el-input v-model="pubForm.title" placeholder="请输入标题"></el-input>
    </el-form-item>

  <el-form-item label="文章分类" prop="cate_id">
     <el-select v-model="pubForm.cate_id" placeholder="请选择分类" style="width: 100%;">
       <el-option :label="item.cate_name" :value="item.id" v-for="item in cateList" :key="item.id"></el-option>
    </el-select>
  </el-form-item>

    <el-form-item label="文章内容" prop="content">
      <!-- 使用 v-model 进行双向的数据绑定 -->
      <quill-editor v-model="pubForm.content"></quill-editor>
   </el-form-item>

   <el-form-item label="文章封面">
        <!-- 用来显示封面的图片 -->
        <img src="../../../assets/images/cover.jpg" alt="" class="cover-img" ref="imgRef" />
        <br />
        <!-- 文件选择框，默认被隐藏 -->
        <input type="file" style="display: none;" accept="image/*" ref="iptFile" @change="onFileChange"/>
        <!-- 选择封面的按钮 -->
        <el-button type="text" @click="chooseImg">+ 选择封面</el-button>
  </el-form-item>

    <el-form-item>
      <el-button type="primary" @click="pubArticle('已发布')">发布</el-button>
        <el-button type="info" @click="pubArticle('草稿')">存为草稿</el-button>
    </el-form-item>

 </el-form>
  </el-dialog>
  <!-- 文章弹出框 -->
<el-dialog title="文章预览" :visible.sync="artDetailVisible" width="80%">
      <h1 class="title">{{ artDetail.title }}</h1>

      <div class="info">
        <span>作者：{{ artDetail.nickname || artDetail.username }}</span>
        <span>发布时间：{{ artDetail.pub_date | dateFormat }}</span>
        <span>所属分类：{{ artDetail.cate_name }}</span>
        <span>状态：{{ artDetail.state }}</span>
      </div>

      <el-divider></el-divider>

      <img :src="'http://www.liulongbin.top:3008'+ artDetail.cover_img">

      <div v-html="artDetail.content"></div>
</el-dialog>
  </div>
</template>

<script>
import defaultImg from '@/assets/images/cover.jpg'
export default {
  name: 'ArtList',
  data () {
    return {
      // 查询参数对象
      q: {
        pagenum: 1,
        pagesize: 2,
        cate_id: '',
        state: ''
      },
      pubDialogVisible: false,
      // 发表文章
      pubForm: {
        title: '',
        cate_id: '',
        content: '',
        cover_img: '',
        state: ''
      },

      // 发表文章表单校验规则
      pubRules: {
        title: [
          { required: true, message: '请输入文章标题', trigger: 'blur' },
          { min: 1, max: 30, message: '文章标题的长度为1-30个字符', trigger: 'blur' }
        ],
        cate_id: [{ required: true, message: '请选择文章标题', trigger: 'blur' }],
        content: [{ required: true, message: '请输入文章内容', trigger: 'blur' }]
      },

      // 文章分类
      cateList: [],

      // 文章列表
      artList: [],
      // 文章总条数
      total: 0,

      artDetail: {},

      artDetailVisible: false
    }
  },

  methods: {
    async handleBeforeClose (done) {
      const res = await this.$confirm('你确定要关闭吗').catch(err => err)
      if (res === 'cancel') return
      done()
    },
    // 获取文章分类
    async initCateList () {
      const { data: res } = await this.$http.get('/my/cate/list')

      if (res.code === 0) {
        this.cateList = res.data
      }
    },
    // 选择文章封面
    chooseImg () {
      this.$refs.iptFile.click()
    },

    onFileChange (e) {
      const files = e.target.files
      if (files.length === 0) {
        this.pubForm.cover_img = null
        this.$refs.imgRef.src = defaultImg
      } else {
        this.pubForm.cover_img = files[0]
        // 实现图片预览
        const url = URL.createObjectURL(files[0])
        this.$refs.imgRef.src = url
      }
    },

    pubArticle (state) {
      this.pubForm.state = state
      // 手动校验
      this.$refs.pubRef.validate(async valid => {
        if (!valid) return this.$message.warning('请完善文章信息！')
        if (!this.pubForm.cover_img) return this.$message.warning('请选择文章封面!')
        // axios发送请求
        const fd = new FormData()

        Object.keys(this.pubForm).forEach(item => {
          fd.append(item, this.pubForm[item])
        })

        const { data: res } = await this.$http.post('/my/article/add', fd)
        if (res.code !== 0) return this.$message.error(res.message)
        this.$message.success(res.message)

        // 关闭弹出框
        this.pubDialogVisible = false

        // 重置文章列表
        this.initArtList()
      })
    },

    handleClose () {
      this.$refs.pubRef.resetFields()
      this.pubForm.cover_img = null
      this.$refs.imgRef.src = defaultImg
    },
    // 获取文章列表
    async initArtList () {
      const { data: res } = await this.$http.get('/my/article/list', { params: this.q })
      if (res.code === 0) {
        this.artList = res.data
        this.total = res.total
      }
    },
    // 分页条数改变
    handleSizeChange (newSize) {
      // 为 pagesize 赋值
      this.q.pagesize = newSize
      // 默认展示第一页数据
      this.pagenum = 1
      // 重新发起请求
      this.initArtList()
    },
    handleCurrentChange (newPage) {
      // 为页码值赋值
      this.q.pagenum = newPage
      // 重新发起请求
      this.initArtList()
    },

    search () {
      this.q.pagenum = 1
      this.initArtList()
    },

    reset () {
      this.$refs.searchRef.resetFields()
      this.q = {
        pagenum: 1,
        pagesize: 2,
        cate_id: '',
        state: ''
      }
      this.initArtList()
    },

    async  getArtDetail (id) {
      const { data: res } = await this.$http.get('/my/article/info', { params: { id } })
      this.artDetail = res.data
      this.artDetailVisible = true
    },

    async delArticle (id) {
      try {
        await this.$confirm('确定要删除吗？')

        const { data: res } = await this.$http.delete('/my/article/info', { params: { id } })
        if (res.code !== 0) return this.$message.error(res.message)
        this.$message.success(res.message)
        // 删除优化
        if (this.artList.length === 1 && this.q.pagenum > 1) {
          this.q.pagenum--
        }
        this.initArtList()
      } catch (err) {
        return err
      }
    }
  },

  created () {
    this.initCateList()
    this.initArtList()
  }
}
</script>

<style lang="less" scoped>
.search-box {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  .btn-pub {
    margin-top: 5px;
  }
}
/deep/ .ql-editor {
  min-height: 250px;
}
.cover-img {
  width: 400px;
  height: 280px;
  object-fit: cover;
}
.el-pagination {
  margin-top: 15px;
}
.title {
  font-size: 24px;
  text-align: center;
  font-weight: normal;
  color: #000;
  margin: 0 0 10px 0;
}

.info {
  font-size: 12px;
  span {
    margin-right: 20px;
  }
}
</style>
